Question

hydrogen and oxygen gas combine to form water. if 1.00g of hydrogen and 1.00g of oxygen are reacted, what is the theoretical yield of water in grams?

Answer 1

The equation for the reaction of hydrogen and oxygen is:

$2H_2 + O_2 \rightarrow 2H_2O$

$M_r(H_2) = 2\\\\\therefore n(H_2) = \frac{1}{2}= 0.5mol = n(H_2O)\\\\m(H_2O) = 0.5 \times M(H_2O) = 0.5 \times 18 = 9g$

Thus, the theoretical yield of water is 9 grams.